Fuel-feeding apparatus for internal-combustion engines.



B. c. SMITH. FUEL FEEDING APPARATUS FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 8| i916- I@ Patented Aug. 21, 1917.

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FUEL-TERMIN@ APPARATUS FOR INTERNAL-COMBUSTION'ENGTNES.

.To all/whom t may conservi:

Be it known that T, BENJAMIN C. Sinrrn, a citizen of the United States of America, residin at Bayonne, N. J., have invented a new an usefulTPuel-Feeding Apparatus for internal-Combustion Engines, of vwhich the following is a specification.

My invention relates to improvements. in oil burning engines of the high compression type, wherein fuel is injected into the engine cylinder at the desired period in the cycle of the engine. My object is to provide certain improved features of construction,

y with the other parts of the injecting mechayupper part of an engine cylinder,

particularly with relation to the operation of thefuelivalve, as .used in combination nism.

Figure l is a vertical sectional view ofv the certain parts which are associated therewith being shown conventionally.

Fig. 2 is a fragmentary view shpwing certain parts on a relatively enlarged scale and in a slightly diderent position from that indicated in Fig. l.

lt should be understood that the drawings are merely illustrative, and do not 'pretend to show exact proportions. Furthermore, the said drawings are illustrativeof a preferred construction, it being my expects tion that various changes and modications maybe made without departing from the spirit and scope of the invention.

ln that form of the invention illustrated herein, l represents the upper part of all ordinary engine cylinder of the water jaclseted type. 2 represents a working piston which is connected in the usual manner with the crank shaft, not shown. 3 represents the usual cylinder head, in this instance of the Water jacketed type. d conventionally represents an air compressor'which leads te a suitable air reservoir 5. 6 conventionally represents a fuel supply tank, 7 represents a -fuel controlling means by which the quanclosed by means of a s ring 9. l() is a fuel feeding piston in the erm of a sleeve sin rrolnidimg the stem of the valve 8. This pis- ,ingly tapered sent Specification ofLetters Patent. Patented huge 2li, llll'e .application tiled July s, 19163. Serial No. leales. l

ton sleeve is movable up and down in what l may term a plug 11,-which is mounted in a bore in the cylinder head, and which may he held in place in any suitable manner, as

by bolts l--l The piston sleeve 10 may have suitable packing rings 13. The fuel feeding piston 1Q. is moved up and down by the operation of the engine through'the medium of any suitable means operating in' time with. the engine, the means shown being a walking beam or rocher armla which is suitably connected with said piston 10 to move the same as the engine rocks said arm. lo is an air pipe or passage leading from the compressore through the receiver 5 to the plug ll, the inner end of said duct piercing the side of the bore in which the feeding y piston 10 travels, the point of entry being slightly below the end 'of the piston 1Q in i the p ug 1l, the inner end of said pipe 18 opening into the bore in which the piston 10 travels near to the seat for the valve 8. 20 is a suitable back check valve to prevent forcing' the fuel back through the duct `18 when-the fuel feeding piston 1.0 is advanc` ing. This valve may, if desired, have a light spring Q2 to assist in closing the saine at the proper time.` The plug l1 haarJ gas tight fit in the piston head, one simple way for securing, said t being to taper the lower end of the plug and to provide a correspond .to receive the same. 21 represente an air proved type, to admit air to the space in the Iworking cylinder above the piston 2.

The lvalve 8 in the form shown, has a tapered' lower end which takes .into a correspondingly tapered seat in 'a contracted passage v24:

inlet valve of any ap at the lower end of the bore in the plug 10.

This contracted lpassage 2,4: leads into the cylinder l. The yvalve is mechanically opened at the proper time by one of the working parts of the engine, such as a cam, indicated conventionally at 25. This cam operates on a rocker arm 26 which is suitably connected with the stem ofthe valve 8 so that when the cam 25 is atvv the proper operative angle it will quickly unseat and open valve S.

50 .Y .certain times, a compressed lair inlet in the Operation: On the descent of the piston 2 the space within the working' cylinder 1 is filled with air. "On the ascent of the piston 2 this air is very highly compressed. When the fuel feeding piston is retracted, fuel is fed in the proper quantity through the passage 18 into the space in the plug bore A yaround the lower end of the valve 8. When in the space partially occupied by fuel.

the piston is fully lretracted,'the compressed air passage is uncovered, and compressed airis forced into the bore of the plug On l the descent or forward movement of the fuel feeding-piston l() this air and fuel is coml pressed. lAt the proper moment," near the forward end of the feeding stroke, the cani opens the valve', so that the then very tion will occur at the proper moment in the cycle of the engine, and this may, of course,

be varied by shifting the operative angle of the cam 25 or in any other way well. known to the mechanic skilled in this art.

In Fig. 1 it may be assumed that the pissame at certain times, a compressed air inlet in the mounting leading into said bore adjacent to the end of the fuel feeding piston at the back of its stroke, and a fuel feeding inlet into said bore between said compressed air inlet and said valve, the means for opening said valve comprising a cam.

3. ln a fuel feeding apparatus for internal combustion engines, an engine driven fuel feeding piston, a mounting therefor v having a bore in which said piston reciprocates, a contracted fuel feeding passage arranged to lead from said bore to an engine cylinder, means for supplying fuel and air to said bore on the back stroke of the piston to be compressed on the forward stroke thereof, a valve for said contracted passage and means in addition to the aforesaid parts for opening said valve at lthe proper time near the end of the fuel feeding stroke of said piston, to permit said compressed air and fuel to be forced through said fuel feeding passage.

4i. ln a fuel feeding apparatus for internal combustion engines, an engine driven fuel feeding piston, a mounting therefor having a bore in which said pistonrecipro- Cates, a fuel feeding passage arranged to lead from said bore to an engine cylinder, a valve for said passage with means for closing the same, a compressed air inlet in said mounting leading into said bore adton 10 has reached, of has approximately/ jacent to the end of the fuel feeding piston at the back of its stroke, a fuel feeding inreached, the forward end' of its stroke which position the valve 8 is shown as open to admit fuel. In Fig. 2 the valve 8 is shown as closed andfit may be assumed that the fuel feeding piston l0eis ascending, during which period fuel is being fed through the passage 18 past valve 20. v l

What I claim is:

1. In a fuel feeding apparatus for internal combustion engines, an engine driven fuel feeding piston, a mounting therefor having a bore in which said piston reciprocates, a fuel feeding passage arranged to lead from i said bore to an engine cylinder, an outwardly opening valve for said passage, withmeans for normally holdingthe same closed, and fmean's for mechanically opening the same at mounting leading' into saidbore adjacent to the end-of the fuel feeding piston at the back of its stroke, and ajfuel feeding inlet into said b ore between said compressedk air inlet and said valve. l

` 2. In a fuel feeding apparatus for internal combustion engines, an engine driven fuel feeding piston, a mounting therefor having a bore in which vsaidy piston reciprocates, a fuel feeding passage arranged to lead from said` bore to an engine'cylinder, an outwardly' opening valve for said passage, with means fornormally' holding the same closed, and means for mechanically opening the let into said bore between said compressed air inlet and said valve.

, 5. ln a fuel feeding apparatus for internal combustion engines,'an engine driven fuel feeding piston, a mounting therefor having a bore 1n -which said piston reciprocates, a fuel feeding passage arran ed to lead from said bore to an engine cy nder, a valve for said passage with meansl for closing the same, a compressed air inlet in said mounting leading into said borel adjacent tothe end of the fuel feedin piston at the back of its stroke, a fuel /feeding inlet into said bore between said'4 compressed air inlet and. said valve, with means for forcing compressed air into, said bore through said air inlet whenthefuel feeding piston is' at the back ofits stroke.

6. ln a fuel feedingapparatus for internalcombustion engines, an engine driven fuel feeding piston, a mounting therefor having a bore'in whichfsaid piston reciprocates, a fuel feeding passage arran ed to lead from said bore to an enginecy inder, a valve 'forI said passage with means for closing the same, a\compressed air inlet in said mounting leading into said bore adjacent to the end of the fuel feeding piston at the back of its stroke,.a fuelv feedlng inlet into saidbore between said com ressed air inlet and 'said valve, with means `or feeding 1,237,965 I v w fuel through the fuel inlet into said bore said bore to an engine cylinder, a valve foi` a While said fuel feeding piston is retracted. said passage, a compressed air inlet in said 7. In a fuel feeding apparatus for nter mounting leading into said bore to supply 1J nal'combustion `engines, an engine `driven air thereto, and a separate fuel feeding d fuel" feeding piston, a mounting therefor inlet leading into said bore to supply fuel having Ya bore in which said piston reciprothereto. Cates, a fuel feeding passage leading from BENJAMIN C. SMITH. 

